Attachment device for connection of tension wires to aircraft spars



F. H. PAGE.

ATTACHMENT DEVICE TOR CONNECTION OT TENSION WIRES TO AIRCRAFT sPARs.

IIITCIIIIIIISOITL 2, 19H).

3 SHEETS-SHEET I.

APPLICATION FILED JULY 7, I9I9.

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F. H. PAGE. ATTACHMENT DEVICE FOR CONNECTION 0F TENSION WIRES T0 AIRCRAFT SPARS.

. APPLICATION FILED IULY 7. i919. 1,314,536.

Patented Sept. 2, 1919.

3 SHEETS-SHEET 2.

F. H. PAGE.

ATTACHMENT DEVICE FON CONNECTION 0F TENSION WIRES T0 AIRCRAFT SPARS.

APPLICAIION FILED IULY 7.1919.

1 ,3 1 4,536 lzltliutwl SIIIII'. 2, 1919.

3 SHEETSWSHELT 3.

UNTTED STATES PATENT Genion.

I FREDERICK HLNDL'EY PAGE, OF LONDON, ENGLAND.

ATTACHMENT DEVICE FOR CONNECTION OF TENSION-WIRES TO AIRCRAFT-SFARS.

Application tiled July 7, 1919.

To all tlf/wm t may concern:

le it known that I, FREDERICK HANDLnY lxon, a subject of the King of Great Britain. residing'at London, England, have 1nvented certain new and useful Improvements in Attachment Devices for Connection ot' 'l`ension-lVires to Aircraft- Spars,' ot' which the following is a spec1cation.

lhisl invention relates to an improved means ot' connecting tension-wires to the spars ol` aircraft.

ln carrying out this invention the spar or like ineinher. hereinafter termed Spar, pierced transverseljv through its neutral axis to receive a tuhular hush to which the ends ot' tensionwires are attached by being passed through apertures in the walls o'l the hush alulseeured therein. j

'l`he tuhular hush is inserted into al hole drilled transversel)l through the spar on its neutral axis and ma)v project on either side. bevond the l'aces otl the spar. 'l`he walls ot' these projecting parts ol the tubular hush are perforated to receive ln'acing-wires or their tightening means which pierce the hush radially. Braeing-wires may also he lxed on to the center or middle portion oit the hush. suitahle holes being drilled in the .spar to allow passage ot the wires or ten- V.sion device.

l`o each side ot the spar. plates of metal, ply-woot] or the like are fixed and these plates are lormed with holesI into which the ends of the tuhular hush project and the said plates ma)v he extended helow thc lower edge ot the spar and serve to support a plato to receive the thrust ot' a strut en the underside of the spar. Rigidl)7 attached to these plates and extending beneath the spar is a U-shaped bracket provided with means ot attachment t'or the incidence bracing-wires and also YFor the attachment ot' a strut to the spar.

The tubular hush may contain segmentally-shaped pieces formed with sockets to receive the. ends ot the bracing-wires or tensioning devices which may he screw-tln'eaded into the said sockets.

lf desired further sets of lnacingovires may be arranged. for instance, to take the dritt-liracings lying in the plane of the supporting wings of the aircraft.

ltel'erring now to the accompanying drawings. Figure l is a perspective view ol a spar provided with the attachment device Specification of Letters Patent.

Patent ed Sept. 2, 191).

Serial No. 309,150.

having tension wires connected therewith according to this invention. Fig. 2 is a transverse section ot the same device and spar. Fig. 3 is a detail view et' a cap to he fitted to the. ends ot the tnhular bush, and Fig. 4t a plan view on a smaller scale of a part ot' a wing-frame showing the driftl bracingwires connected to the ends of the before mentioned tuhular hush.

The tuhular bush l is passed through a hole drilled transversely through the spar Q on its neutral axis, said bush having its ends project-,ing on either side beyond the walls thereof.

The walls of the projecting ends of thc hush 1 are perforated t0 receive the endsl of the tensioning devices 4r otl the. bracing-wires 3 which pass through the walls ot the bush 1 radially and are secured in position h v segmental seats 5 each Aformed with a socket to receive the end ot' the tensioning device L'|. such seats 5 being placed within the hush l and in contact with the interior walls thereof.

As shown at Fig. Vl. one ot the tension devices ot a lnacing\\'ire pierces the central portion ol the tuhular hush a suitahle hole being drilled in the spar to allow passage tor the said tension device.

A cap o shown separately at Fig. Il is ati tixed to the end ol the hush l where neces sary. to receive. for instance. a drift-strut T and dritt bracing-wires S as shown at Fig. Al. 'l`he cap tt comprises a tuhular portion tl adapted to lit over the projecting end ot the hush 1 and an outstanding tin or projection l() having suitahle holes l1 At'or the attachment thereto ot ln'acingovires t, the said lin also receiving the slotted end of a strut T as shown at Figs. l and l.

Tn Fig. -l a cap (t is shown placed on the inncr end oi the hrush l ol' the l'lont .spar 2 and similarlyY on the inner end ol the hush 1 ol the rear spar l2 to receive the dri ttwires S and the ends ol' the dritt-strut T.

Fixed to the walls ol' the spar around the projecting endsv olt the tuhular hush 1 are plates il. such plates extending downward slightly helow the edge ot' the spar and supporting a thrust-plate l-t heneath the spar and to these plates It a Ushaped hracket. l5 is rigidi)y attached.

rl`he hrackel l5 projects at right angles t'roni plates lil on cach side ot the lspar and aisscs beneath the plate ll where it projects downwardly at right angles to the said plate, and it is also provided with ianges 16 by which it is secured to the plates -13 and 14.-.

This bracket 15 is formed With holes 17 to receive bolts 18 Which engage sockets 19 carried on a strut 20 for the attachment of the said strut to the spar 2, and on one side of the spar the outstanding portion ofthe bracket is slightlyY extended and forms an eyeV 21' for receiving the incidence bracingwires. The bracket 15 is suitably .formed of two plates With opposite flanges 16 bent at right angles for attachment to the plate 13.

What I claim as my invention and desire to secure by Letters Patent is:-

1. In attachment devices for use in aircraft construction; a tubular bush extending transversely through the vneutral axis of a spar, its Walls having apertures therein for I receiving tension-members the ends of which pass through the said apertures and are secured to seats supported interiorly of the Walls of the tubular bush.

2. In attachment devices for-use in air-v craft construction; a tubular bush extendin transversely through the neutral axis of a spar, its ends projecting beyond the faces of the spar, said ends having apertures in craft construction; a tubular bush extending transversely through the neutral axis of a spar, its ends projecting beyond the faces of the spar or strut, apertures in the Walls of said tubular bush, a cap fitting the projecting end thereof and provided eXteriorly with a projecting: fin capable of receiving the cud of a rigid member such as the slotted end of a strut.

4. In attachment devices for use in aircraft construction; a tubular bush extend-- ing transversely through the neutral axis ofy a spar, its ends projecting beyond the faces Y of the spar, apertures in the Walls of said tubular bush, a cap fitting the projecting"v ends thereof provided exteriorly with afp' faces of the spar, apertures in the Walls of,`

the said bush to receive tension-members, plates secured to the side faces of. the spar and embracing the projecting endsof the tubular bush and supporting at their lower ends a plate in contact with the underside of the spar. Y

6. In attachment devices for use in air' craft construction; a. tubular bush extendingy transversely through the neutral aXis of a spar, lapertures in the Walls of the said bush to receive tension members, plates secured to the side faces of the spar and aU- shaped bracket secured to the said plates,

said bracket comprising an outstandingrr flange provided with means for receiving` a rigid membersuch as the slotted end of a strut and being formed withl holes to receive tension-members.

In Witness whereof I have hereunto set my hand in the presence of two witnesses.

FREDERICK HANDLEY PAGE.

Witnesses:

GRIFFITH BREWER, CYRIL GRIFFITH BREWER. 

